Question

the sum of ap with 15 term is 180 then the 8 term is​

Answer 1

.................................

Answer 2

Step-by-step explanation:

Sn = n/2[ 2a + ( n - 1 ) d ]

180 = 15/2[ 2a + ( 15 - 1 ) d ]

180 = 15/2 ( 2a + 14 d)

180/15 = 1/2 ( 2 a + 14 d)

180/15 = a + 7d

a + 7d = 12

a8 = a + 7 d

a8 =12